Effect of Asymmetric Corneal Curvature on Optical Zone Decentration and Refractive Outcomes in SMILE for Myopic Astigmatism

被引:0
作者
Fu, Xinyi [1 ]
Zhao, Xiaoyan [1 ]
Gao, Guohong [1 ]
Yu, Zhilong [1 ]
Wang, Feng [1 ]
Li, Shuxin [2 ]
机构
[1] Weifang Med Univ, Shandong Second Med Univ, Ophthalm Ctr, Affiliated Hosp, Weifang, Peoples R China
[2] Shandong Second Med Univ, Affiliated Hosp 1, Dept Cardiol, Weifang, Peoples R China
关键词
INCISION LENTICULE EXTRACTION; CLINICAL-OUTCOMES; LASIK; PRK;
D O I
10.3928/1081597X-20241219-02
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
PURPOSE: To investigate the effect of asymmetric corneal curvature on refractive outcomes and optical zone decentration at a 2-year follow-up after small incision lenticule extraction (SMILE) for myopic astigmatism. METHODS: In this prospective study, 96 patients (169 eyes) with myopia and astigmatism (low astigmatism group [cylinder <-2.00 diopters (D)], 91 eyes; high astigmatism group [cylinder >=-2.00 D], 78 eyes) were treated using SMILE. Twoyear postoperative refractive outcomes and optical zone decentration were analyzed and compared between the groups. RESULTS: Both groups achieved good visual and refractive outcomes. The mean postoperative cylinder in the low astigmatism group was significantly lower than that in the high astigmatism group (P < .05). The mean decentration in the low astigmatism group was lower than that in the high astigmatism group (P < .05). In the low astigmatism group, a weak positive correlation was observed between target induced astigmatism (TIA) and the arithmetic mean of angle of error (|AE|), difference vector (DV), and the arithmetic mean of magnitude of error (|ME|). Additionally, a weak positive correlation was observed between decentration and both the arithmetic mean of corneal front surface curvature asymmetry indices (|Sif|) and TIA. Within the high astigmatism group, TIA exhibited a weak positive correlation with |AE|, DV, and |ME|. Similarly, decentration demonstrated a weak positive correlation with |Sif|, TIA, DV, and |ME| (all P < .05). CONCLUSIONS: SMILE surgery achieves good long-term refractive outcomes for correcting myopic astigmatism. However, there are still limitations to the accuracy of high astigmatism correction. Asymmetric corneal surface curvature may affect the astigmatism correction and optical zone decentration.
引用
收藏
页码:e173 / e185
页数:13
相关论文
共 35 条
  • [1] Small incision lenticule extraction (SMILE) in the correction of myopic astigmatism: outcomes and limitations - an update
    Alio del Barrio, Jorge L.
    Vargas, Veronica
    Al-Shymali, Olena
    Alio, Jorge L.
    [J]. EYE AND VISION, 2017, 4
  • [2] Astigmatism analysis by the Alpins method
    Alpins, N
    [J]. JOURNAL OF CATARACT AND REFRACTIVE SURGERY, 2001, 27 (01) : 31 - 49
  • [3] Vector analysis of astigmatism changes by flattening, steepening, and torque
    Alpins, NA
    [J]. JOURNAL OF CATARACT AND REFRACTIVE SURGERY, 1997, 23 (10) : 1503 - 1514
  • [4] Randomized Clinical Trial Comparing Femtosecond LASIK and Small-Incision Lenticule Extraction
    Ang, Marcus
    Farook, Mohamed
    Htoon, Hla M.
    Mehta, Jodhbir S.
    [J]. OPHTHALMOLOGY, 2020, 127 (06) : 724 - 730
  • [5] Effect of corneal curvature on optical zone decentration and its impact on astigmatism and higher-order aberrations in SMILE and LASIK
    Chan, Tommy C. Y.
    Wan, Kelvin H.
    Kang, David S. Y.
    Tso, Tiffany H. K.
    Cheng, George P. M.
    Wang, Yan
    [J]. GRAEFES ARCHIVE FOR CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY, 2019, 257 (01) : 233 - 240
  • [6] Comparison of clinical outcomes of LASIK, Trans-PRK, and SMILE for correction of myopia
    Chang, Jin-Yu
    Lin, Pei-Yu
    Hsu, Chih-Chien
    Liu, Catherine Jui-Ling
    [J]. JOURNAL OF THE CHINESE MEDICAL ASSOCIATION, 2022, 85 (02) : 145 - 151
  • [7] Comparison of Small Incision Lenticule Extraction Surgery With and Without Cyclotorsion Error Correction for Patients With Astigmatism
    Chen, Pei
    Ye, Yiming
    Yu, Na
    Zhang, Xiaoying
    He, Jiexu
    Zheng, Hua
    Wei, Han
    Zhuang, Jing
    Yu, Keming
    [J]. CORNEA, 2019, 38 (06) : 723 - 729
  • [8] Correction of Astigmatism With SMILE With Axis Alignment: 6-Month Results From 622 Eyes
    Chen, Pei
    Ye, Yiming
    Yu, Na
    Zhang, Xiaoying
    Zhuang, Jing
    Yu, Keming
    [J]. JOURNAL OF REFRACTIVE SURGERY, 2019, 35 (03) : 138 - +
  • [9] Astigmatism Correction Using SMILE
    Chow, Sharon S. W.
    Chow, Loraine L. W.
    Lee, Chester Z.
    Chan, Tommy C. Y.
    [J]. ASIA-PACIFIC JOURNAL OF OPHTHALMOLOGY, 2019, 8 (05): : 391 - 396
  • [10] Efficacy of small-incision lenticule extraction surgery in high astigmatism: A meta-analysis
    Cui, Ge
    Di, Yu
    Yang, Shan
    Chen, Di
    Li, Ying
    [J]. FRONTIERS IN MEDICINE, 2023, 9